CHAPTER 8
INTERNATIONAL ENERGY CONSERVATION
SECTION:
7-8-1: International Energy Conservation Code
7-8-2: International Energy Conservation Code Amendments
7-8-1 INTERNATIONAL ENERGY CONSERVATION CODE:
A. Code Adopted: All rules, regulations and ordinances of a general and permanent character relating to and applying to energy conservation, said rules, regulations and ordinances are printed and contained in a book in code form designated and entitled the International Energy Conservation Code (IECC), printed and published under the authority of the International Code Council, and as adopted by the state of Idaho, together with rules and regulations adopted by the state of Idaho, be and the same hereby is ratified and adopted in its entirety as the energy conservation code for the city. Nonconventional approaches, in an effort to increase energy efficiency and water conservation practices, may be examined on a case-by-case basis for safety should they not meet the requirements of the adopted code.
B. Code On File: A copy of International Energy Conservation Code as adopted by the state of Idaho shall be retained by the city and shall be filed in the office of the city clerk in accordance with Idaho Code section 50-901 for use and examination by the public. (Ord. 973-14, 12-8-2014)
7-8-2 INTERNATIONAL ENERGY CONSERVATION CODE AMENDMENTS:
The International Energy Conservation Code, 2012 Edition, prepared by the International Code Council, Inc., as adopted by the state of Idaho or the Idaho Building Code Board, together with any amendments or revisions, is adopted with the following amendments:
A. Section C101.1, Title
C101.1 Title. This code shall be known as the Energy Conservation Code of Garden City, and shall be cited as such. It is referred to herein as "this code."
B. Section C107, Fees
Any applicable fees shall be as established in Garden City Code § 7-1-4.
C. Section C108, Stop Work Order
Section C108 shall be repealed in its entirety and replaced with the following:
C108 Stop work order. Whenever the building official identifies any work regulated by the Energy Conservation Code being performed in a manner contrary to the provisions of this code or in a dangerous or unsafe manner, the building official is authorized to issue a stop work order in accordance with Section 115 of the International Building Code or Section R114 of the International Residential Code.
D. Section C109, Board Of Appeals
The Board of Appeals shall be established as described in Garden City Code § 7-1-11.
E. Add Section C110, Violations
Violations shall be identified and enforced upon as described in Garden City Code § 7-1-13.
F. Section C201.3, Terms Defined In Other Codes
C201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the currently adopted editions in the International Building Code, International Residential Code, National Electrical Code, International Fire Code, International Fuel Gas Code, International Mechanical Code or the Uniform Plumbing Code, such terms shall have the meanings ascribed to them as in those codes.
G. Section R101.1, Title
R101.1 Title. This code shall be known as the Energy Conservation Code of Garden City, and shall be cited as such. It is referred to herein as "this code."
H. Section R107, Fees
Any applicable fees shall be as established in Garden City Code § 7-1-4.
I. Section R108, Stop Work Order
R108 Stop work order. Whenever the building official identifies any work regulated by the Energy Conservation Code being performed in a manner contrary to the provisions of this code or in a dangerous or unsafe manner, the building official is authorized to issue a stop work order in accordance with Section 115 of the International Building Code or Section R114 of the International Residential Code.
J. Section R109, Board Of Appeals
The Board of Appeals shall be established as described in Garden City Code § 7-1-11.
K. Add Section R110, Violations
Violations shall be identified and enforced upon as described in Garden City Code § 7-1-13.
L. Section R201.3, Terms Defined In Other Codes
R201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the currently adopted editions in the International Building Code, International Residential Code, National Electrical Code, International Fire Code, International Fuel Gas Code, International Mechanical Code or the Uniform Plumbing Code, such terms shall have the meanings ascribed to them as in those codes.
M. Table R402.1.1, Insulation And Fenestration Requirements By Component
Items listed under Climate Zone 5 and Marine 4 in Table R402.1.1 shall be amended as follows:
|
Climate Zone |
Fenestration |
Skylight U-factorb |
Glazed |
Ceiling |
Wood Frame Wall |
|---|---|---|---|---|---|
|
5 and Marine 4 |
0.35 |
0.60 |
NR |
38 |
20 or 13+5h |
|
Mass Wall |
Floor |
Basementc Wall R-Value |
Slabd |
Crawl-spacec |
|---|---|---|---|---|
|
13/17 |
30g |
10/13 |
10, 2ft |
10/13 |
N. Table R402.1.1, Insulation And Fenestration Requirements By Component, Added Footnote K
Add footnote k to the title of Table R402.1.1, Insulation and Fenestration Requirements by Component. Add footnote k underneath Table R402.1.1 after footnote j to read as follows:
k. For residential log home building thermal envelope construction requirements see section R402.6.
O. Table R402.1.3, Equivalent U-Factors
Items listed under Climate Zone 5 and Marine 4 in Table R402.1.3 shall be amended as follows:
|
Climate Zone |
Fenestration |
Skylight |
Ceiling |
Wood Frame Wall U-factor |
|---|---|---|---|---|
|
5 and Marine 4 |
0.35 |
0.60 |
0.030 |
0.057 |
|
Mass Wall |
Floor U-factor |
Basement Wall U-factor |
Crawlspace Wall U-factor |
|---|---|---|---|
|
0.082 |
0.033 |
0.059 |
0.065 |
P. Table R402.2.6, Steel-Frame Ceiling, Wall And Floor Insulation (R-Value)
Table R402.2.6 shall be repealed and replaced with the following:
|
WOOD FRAME R-VALUE REQUIREMENT |
COLD-FORMED STEEL EQUIVALENT |
|---|---|
|
|
Steel Truss Ceilingsa |
|
R-30 |
R-38 or R-30 + 3 or R-26 + 5 |
|
R-38 |
R-49 or R-38 +3 |
|
R-49 |
R-38 + 5 |
|
|
Steel Joist Ceilingsb |
|
R-30 |
R-38 in 2 x 4 or 2 x 6 or 2 x 8 R-49 in any framing |
|
R-38 |
R-49 in 2 x 4 or 2 x 6 or 2 x 8 or 2 x 10 |
|
|
Steel-Framed Wall |
|
R-13 |
R-13 + 5 or R-15 + 4 or R-21 + 3 or R-0 + 10 |
|
R-19 |
R-13 + 9 or R-19 + 8 or R-25 + 7 |
|
R-21 |
R-13 + 10 or R-19 + 9 or R-25 + 8 |
|
|
Steel Joist Floor |
|
R-13 |
R-19 in 2 x 6 |
|
R-19 |
R-19 + 6 in 2 x 6 |
a. Cavity insulation R-value is listed first, followed by continuous insulation R-value.
b. Insulation exceeding the height of the framing shall cover the framing.
Q. Section R402.4.1, Building Thermal Envelope
Repeal section R402.4.1 and replace with the following:
R402.4.1 Building thermal envelope. The building thermal envelope shall comply with Sections R402.4.1.1 and either R402.4.1.2 or R402.4.1.3. The sealing methods between dissimilar materials shall allow for differential expansion and contraction.
R. Table R402.4.1.1, Air Barrier And Insulation Installation
Repeal the criteria requirement for the "fireplace" component of Table R402.4.1.1 and replace with the following:
|
COMPONENT |
CRITERIAa |
|---|---|
|
Fireplace |
An air barrier shall be installed on fireplace walls. |
S. Section R402.4.1.2, Testing Option
Repeal section R402.4.1.2 and replace with the following:
R402.4.1.2 Testing option. Building envelope tightness and insulation installation shall be considered acceptable when tested air leakage is less than seven (7) air changes per hour (ACH) when tested with a blower door at a pressure of 33.5 psf (50 pascals). Testing shall occur after rough in and after installation of penetrations of the building envelope, including penetrations for utilities, plumbing, electrical, ventilation and combustion appliances.
During testing:
1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed;
2. Dampers shall be closed, but not sealed; including exhaust, intake, makeup air, back draft, and flue dampers;
3. Interior doors shall be open;
4. Exterior openings for continuous ventilation systems and heat recovery ventilators shall be closed and sealed;
5. Heating and cooling system(s) shall be turned off;
6. HVAC ducts shall not be sealed; and
7. Supply and return registers shall not be sealed.
T. Add Section R402.4.1.3, Visual Inspection Option
R402.4.1.3 Visual inspection option. Building envelope tightness and insulation installation shall be considered acceptable when the items listed in Table R402.4.1.1, applicable to the method of construction, are field verified. Where required by the code official an approved party independent from the installer of the insulation shall inspect the air barrier and insulation.
U. Section R402.6, Residential Log Home Thermal Envelope
Residential log home construction shall comply with sections R401 (General), R402.4 (Air Leakage), R402.5 (Maximum Fenestration U-Factor and SHGC), R403.1 (Controls), R403.2.2 (Sealing), R403.2.3 (Building Cavities), sections R403.3 through R403.9 (referred to as the mandatory provisions), Section R404 (Electrical Power and Lighting Systems), and either subsection i., ii., or iii. as follows:
i. Sections R402.2 through R402.3, R403.2.1, R404.1 and Table R402.6;
ii. Section R405 Simulated Performance Alternative (Performance); or
iii. REScheck (U.S. Department of Energy Building Codes Program).
V. Table R402.6, Log Home Prescriptive Thermal Envelope Requirements By Component
|
CLIMATE ZONE |
FENESTRATION |
SKYLIGHT U-FACTOR |
GLAZED |
CEILING R-VALUE |
Min. |
FLOOR R-VALUE |
BASEMENT WALL |
SLAB |
CRAWL SPACE WALL |
|
5, 6 – High efficiency equipment pathc |
0.32 |
0.60 |
NR |
49 |
5 |
30 |
15/19 |
10, 4 ft. |
10/13 |
|
5 |
0.32 |
0.60 |
NR |
49 |
8 |
30 |
10/13 |
10, 2 ft. |
10/13 |
For SI: 1 foot = 304.8 mm.
a. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
b. R-5 shall be added to the required slab edge R-values for heated slabs.
c. 90% AFUE natural gas or propane, 84% AFUE oil, or 15 SEER heat pump heating equipment (zonal electric resistance heating equipment such as electric base board electric resistance heating equipment as the sole source for heating is considered compliant with the high efficiency equipment path).
d. "15/19" means R-15 continuous insulated sheathing on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. "15/19" shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulated sheathing on the interior or exterior of the home. "10/13" means R-10 continuous insulated sheathing on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall.
W. Section R404.1, Lighting Equipment (Mandatory)
R404.1 Lighting equipment (Mandatory). A minimum of 50 percent of the lamps in permanently installed lighting fixtures shall be high-efficacy lamps or a minimum of 50 percent of the permanently installed lighting fixtures shall contain only high efficacy lamps.
Exception: Low-voltage lighting shall not be required to utilize high-efficacy lamps.
(Ord. 973-14, 12-8-2014)